Web.pm

   1 # $Id$
   2 # Common functions for HTML/XHTML output generation
   3 # Copyright (C) 2003-2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; exactly version 2 of June 1991 is required
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18
  19 package My::Web;
  20 require 5.6.0;  # at least 'use warnings;' but we need some 5.6.0+ modules anyway
  21 our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
  22 our $CVS_ID=q$Id$;
  23 use strict;
  24 use warnings;
  25
  26 use Exporter;
  27 sub Wrequire($);
  28 sub Wuse($@);
  29 our $W;
  30 our @EXPORT=qw(
  31                 &Wrequire &Wuse
  32                 &path_web &path_abs_disk
  33                 &uri_escaped
  34                 &a_href &a_href_cc
  35                 &vskip
  36                 &img &centerimg &rightimg
  37                 $W
  38                 &input_hidden_persistents
  39                 &escapeHTML
  40                 );
  41 our @ISA=qw(Tie::Handle Exporter);
  42
  43 my %packages_used_hash; # $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
  44 my %packages_used_array;
  45
  46 BEGIN
  47 {
  48         use Carp qw(cluck confess);
  49         $W->{"__My::Web_init"}=1;
  50
  51         sub Wrequire ($)
  52         {
  53         my($file)=@_;
  54
  55 #               print STDERR "Wrequire $file\n";
  56                 $file=~s#/#::#g;
  57                 $file=~s/[.]pm$//;
  58                 my $class=$file;
  59                 $file=~s#::#/#g;
  60                 $file.=".pm";
  61                 my %callers;
  62                 for (my $depth=0;defined caller($depth);$depth++) {
  63                         $callers{caller($depth)}=1;
  64                         }
  65                 my $selfpkg=__PACKAGE__;
  66                 $callers{$selfpkg}=1;
  67                 for my $target ($class,__PACKAGE__) {
  68                         for my $caller (keys(%callers)) {
  69                                 next if $caller eq $target;
  70                                 next if $packages_used_hash{$caller}{$target}++;
  71                                 push @{$packages_used_array{$caller}},$target;
  72                                 }
  73                         }
  74                 eval { CORE::require "$file"; } or confess $@;
  75                 1;      # Otherwise 'require' would already file above.
  76         }
  77
  78         sub Wuse ($@)
  79         {
  80         my($file,@list)=@_;
  81
  82 #               print STDERR "Wuse $file\n";
  83                 Wrequire $file;
  84                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  85                 $file->import(@list);
  86                 1;
  87         }
  88
  89         sub import
  90         {
  91         my($class,@rest)=@_;
  92
  93                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  94                 Wrequire("$class");
  95                 return $class->SUPER::import(@rest);
  96         }
  97 }
  98
  99 use WebConfig;  # see also below: Wuse 'WebConfig';
 100 require CGI;
 101 require Image::Size;    # for &imgsize
 102 use File::Basename;     # &basename
 103 use Carp qw(cluck confess);
 104 use URI::Escape;
 105 require HTTP::BrowserDetect;
 106 require HTTP::Negotiate;
 107 our $have_Geo_IP; BEGIN { $have_Geo_IP=eval { require Geo::IP; 1; }; }
 108 # Do not: use ModPerl::Util qw(exit);
 109 # to prevent in mod_perl2: "exit" is not exported by the ModPerl::Util module
 110 # I do not know why.
 111 use POSIX qw(strftime);
 112 use Tie::Handle;
 113 use Apache2::Const qw(HTTP_MOVED_TEMPORARILY OK HTTP_OK);
 114 use URI;
 115 use URI::QueryParam;
 116 use Cwd;
 117 require HTTP::Date;
 118 require Storable;
 119 require Digest::MD5;
 120 require Data::Compare;
 121 use Data::Dumper;
 122 require Encode;
 123 use Apache2::Filter;
 124 use Apache2::Connection;
 125 require MIME::Base64;
 126
 127
 128 #our $W;
 129
 130 sub cleanup($)
 131 {
 132 my($apache_request)=@_;
 133
 134         $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
 135         cache_finish();
 136         # Sanity protection.
 137         $W=undef();
 138         return OK;
 139 }
 140
 141 sub request_check(;$)
 142 {
 143 my($self)=@_;
 144
 145         # Use &eval to prevent: Global $r object is not available. Set:\n\tPerlOptions +GlobalRequest\nin ...
 146         # CGI requires valid "r": check it beforehand here.
 147         confess "Calling sensitive dynamic code from a static code" if !eval { Apache2::RequestUtil->request(); };
 148         # Do not: confess "Calling sensitive dynamic code without My::Web::init" if !$W->{"__PACKAGE__"};
 149         # as it is valid at least while preparing arguments to call: &project::Lib::init
 150 }
 151
 152 sub init ($%)
 153 {
 154 my($class,%args)=@_;
 155
 156         print STDERR "$class->init ".Apache2::RequestUtil->request()->unparsed_uri()."\n";
 157
 158         # We need to track package dependencies, so we need to call it from &init.
 159         # We cannot do it in BEGIN { } block
 160         # as it would not be tracked for each of the toplevel users later.
 161         Wuse 'WebConfig';
 162         Wrequire 'My::Hash';
 163
 164         $W=My::Hash->new({
 165                 "__PACKAGE__"=>scalar(caller()),
 166                 %WebConfig,
 167                 %args,  # override %WebConfig settings
 168                 },"My::Hash::Sub","My::Hash::Push");
 169
 170         # {"__PACKAGE__"} is mandatory for mod_perl-2.0;
 171         # $Apache2::Registry::curstash is no longer supported.
 172         do { cluck "No $_" if !$W->{$_}; } for "__PACKAGE__";
 173
 174         # See: &escapeHTML
 175         do { cluck "charset==$_, expecting ISO-8859-1" if $_ ne "ISO-8859-1"; } for CGI::charset();
 176         CGI::charset("utf-8");
 177
 178         do { $W->{$_}=0  if !defined $W->{$_}; } for "detect_ent";
 179         do { $W->{$_}=0  if !defined $W->{$_}; } for "detect_js";
 180         do { $W->{$_}=1  if !defined $W->{$_}; } for "have_css";        # AFAIK it does not hurt anyone.
 181         do { $W->{$_}=0  if !defined $W->{$_}; } for "css_inherit";
 182         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer";
 183         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer_delimit";
 184         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer_ids";
 185         do { $W->{$_}=1  if !defined $W->{$_}; } for "indexme";
 186         do { $W->{$_}="" if !defined $W->{$_}; } for "head";
 187         do { $W->{$_}="" if !defined $W->{$_}; } for "body_attr";
 188         do { $W->{$_}="en-US" if !defined $W->{$_}; } for "language";
 189
 190         my $footer_any=0;
 191         for (qw(footer_ids)) {
 192                 $W->{$_}=0 if !$W->{"footer"};
 193                 $footer_any=1 if $W->{$_};
 194                 }
 195         $W->{"footer"}=0 if !$footer_any;
 196         $W->{"footer_delimit"}=0 if !$W->{"footer"};
 197
 198         $W->{"r"}=Apache2::RequestUtil->request();
 199
 200         $W->{"r"}->push_handlers("PerlCleanupHandler"=>\&cleanup);
 201
 202         $W->{"web_hostname"}||=$W->{"r"}->hostname();
 203
 204         tie *STDOUT,$W->{"r"};
 205         select *STDOUT;
 206         $|=1;
 207
 208         $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
 209         if ($W->{"detect_ent"}) {
 210                          if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
 211                         { $W->{"have_ent"}=0; }
 212                 elsif ($W->{"QUERY_STRING"}=~    /[&]have_ent/)
 213                         { $W->{"have_ent"}=1; }
 214                 else
 215                         { delete $W->{"have_ent"}; }
 216                 if (!defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
 217                         $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
 218                                         .escapeHTML("http://".$W->{"web_hostname"}."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
 219                                                         ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
 220                                         .'" />'."\n";
 221                         }
 222                 }
 223         $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
 224         $W->{"r"}->args($W->{"QUERY_STRING"});
 225         # Workaround: &CGI::Vars behaves weird if strings passed both as POST data and in: $QUERY_STRING
 226         do { $W->{"r"}->args(""); delete $ENV{"QUERY_STRING"}; } if $W->{"r"}->method() eq "POST";
 227         # Do not: $W->{"r"}->args()
 228         # as it parses only QUERY_STRING (not POST data).
 229         $W->{"args_orig_array"}=[ CGI->new($W->{"r"})->Vars() ];
 230         $W->{"args"}={ @{$W->{"args_orig_array"}} };
 231         for my $name (keys(%{$W->{"args"}})) {
 232                 my @vals=split /\x00/,$W->{"args"}{$name};
 233                 next if @vals<=1;
 234                 $W->{"args"}{$name}=[@vals];
 235                 }
 236
 237         $W->{"headers_in"}=$W->{"r"}->headers_in();
 238         Wrequire 'My::Hash::Merge';
 239         $W->{"headers_in"}=My::Hash::Merge->new(
 240                         $W->{"headers_in"},
 241                         My::Hash::Sub->new({
 242                                 "_remote_ip"=>sub { return $W->{"r"}->connection()->remote_ip(); },
 243                                 }),
 244                         );
 245         Wrequire 'My::Hash::Readonly';
 246         $W->{"headers_in"}=My::Hash::Readonly->new($W->{"headers_in"});
 247
 248         if ($W->{"r"}->method() eq "GET" || $W->{"r"}->method() eq "HEAD") {
 249                 for (\$W->{"http_safe"}) {
 250                         # Do not: # Extend the current ETag system instead if you would need it:
 251                         #         cluck "Explicitely NOT HTTP-Safe for method \"".$W->{"r"}->method()."\"?!?"
 252                         #                       if defined($$_) && !$$_;
 253                         # as sometimes it just does not make sense to cache it.
 254                         $$_=1 if !defined $$_;
 255                         }
 256                 }
 257         else {
 258                 for (\$W->{"http_safe"}) {
 259                         cluck "Undefined HTTP-Safe-ty for method \"".$W->{"r"}->method()."\"!"
 260                                         if !defined($$_);
 261                         $$_=0 if !defined $$_;
 262                         }
 263                 }
 264         if ($W->{"http_safe"}) {
 265                 Wrequire 'My::Hash::RecordKeys';
 266                 $W->{"headers_in_RecordKeys"}=My::Hash::RecordKeys->new($W->{"headers_in"});
 267                 $W->{"headers_in"}=$W->{"headers_in_RecordKeys"};
 268                 }
 269
 270         $W->{"browser"}=HTTP::BrowserDetect->new($W->{"headers_in"}{"User-Agent"});
 271
 272         if (!defined $W->{"have_style"}) {
 273                 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
 274                 }
 275
 276         $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
 277         if ($W->{"detect_js"} && !$W->{"have_js"}) {
 278                 $W->{"head"}.='<script type="text/javascript" src="'.uri_escaped(path_web('/My/HaveJS.pm')).'"></script>'."\n";
 279                 }
 280
 281         do { _args_check(%$_) if $_; } for ($W->{"args_check"});
 282
 283         return bless $W,$class;
 284 }
 285
 286 # Be aware other parts of code (non-My::Web) will NOT use this function!
 287 # Do not: Wprint $W->{"heading"},"undef"=>1;
 288 # as we would need to undef() it to turn it off and it would get defaulted in such case.
 289 # Do not: exists $W->{"heading"}
 290 # as we use a lot of 'for $W->{"heading"}' which instantiates it with the value: undef()
 291 sub Wprint($%)
 292 {
 293 my($text,%args)=@_;
 294
 295         cluck "undef Wprint" if !defined $text && !$args{"undef"};
 296         delete $args{"undef"};
 297         cluck join(" ","Invalid arguments:",keys(%args)) if keys(%args);
 298         return if !defined $text;
 299         # Do not: cluck "utf-8 untested" if Encode::is_utf8($text);
 300         # as it is valid here.
 301         $W->{"r"}->puts($text);
 302 }
 303
 304 sub escapeHTML($)
 305 {
 306 my($text)=@_;
 307
 308         # Prevent &CGI::escapeHTML breaking utf-8 strings like: \xC4\x9B eq \x{11B}
 309         # Prevent case if we run under mod_perl but still just initializing:
 310         request_check() if $ENV{"MOD_PERL"};
 311         # Generally we are initialized from &init but we may be used without it without mod_perl
 312         # and in such case check the change on all non-first invocations.
 313         our $init;
 314         if (!$ENV{"MOD_PERL"} && $init++) {
 315                 do { cluck "charset==$_" if $_ ne "utf-8"; } for CGI::charset();
 316                 }
 317         CGI::charset("utf-8");
 318
 319         return CGI::escapeHTML($text);
 320 }
 321
 322 # /home/user/www/webdir
 323 sub dir_top_abs_disk()
 324 {
 325         our $dir_top_abs_disk;
 326         if (!$dir_top_abs_disk) {
 327                 my $selfpkg_relpath=__PACKAGE__;
 328                 $selfpkg_relpath=~s{::}{/}g;
 329                 $selfpkg_relpath.=".pm";
 330                 my $selfpkg_abspath=$INC{$selfpkg_relpath} or do {
 331                         cluck "Unable to find self package $selfpkg_relpath";
 332                         return;
 333                         };
 334                 $selfpkg_abspath=~s{/*\Q$selfpkg_relpath\E$}{} or do {
 335                         cluck "Unable to strip myself \"$selfpkg_relpath\" from the abspath: $selfpkg_abspath";
 336                         return;
 337                         };
 338                 cluck "INC{myself} is relative?: $selfpkg_abspath" if $selfpkg_abspath!~m{^/};
 339                 $dir_top_abs_disk=$selfpkg_abspath;
 340                 }
 341         return $dir_top_abs_disk;
 342 }
 343
 344 sub unparsed_uri()
 345 {
 346         request_check();
 347         if (!$W->{"unparsed_uri"}) {
 348                 # Do not: $W->{"r"}
 349                 # as we may be called before &init from: &My::Project::init
 350                 my $r=Apache2::RequestUtil->request();
 351                 cluck "Calling ".'&unparsed_uri'." from a static code, going to fail" if !$r;
 352                 my $uri_string=$r->unparsed_uri() or cluck "Valid 'r' missing unparsed_uri()?";
 353                 my $uri=URI->new_abs($uri_string,"http://".$W->{"web_hostname"}."/");
 354                 $W->{"unparsed_uri"}=$uri;
 355                 }
 356         return $W->{"unparsed_uri"};
 357 }
 358
 359 sub in_to_uri_abs($)
 360 {
 361 my($in)=@_;
 362
 363         # Otherwise we may have been already processed and thus legally relativized.
 364         # FIXME data: Currently disabled, all the data are too violating such rule.
 365         if (0 && !ref $in) {
 366                 my $uri_check=URI->new($in);
 367                 $uri_check->scheme() || $in=~m{^\Q./\E} || $in=~m{^/}
 368                                 or cluck "Use './' or '/' prefix for all the local references: $in";
 369                 }
 370         my $uri=URI->new_abs($in,unparsed_uri());
 371         $uri=$uri->canonical();
 372         return $uri;
 373 }
 374
 375 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
 376 # $args{"abs"}=1;
 377 sub path_web($%)
 378 {
 379 my($in,%args)=@_;
 380
 381         cluck if !$args{"uri_as_in"} && ref $in;
 382         my $uri=in_to_uri_abs($in);
 383         if (uri_is_local($uri)) {
 384                 # Prefer the $uri values over "args_persistent" values.
 385                 $uri->query_form_hash({
 386                                 map({
 387                                         my $key=$_;
 388                                         my $val=$W->{"args"}{$key};
 389                                         (!defined $val ? () : ($key=>$val));
 390                                         } keys(%{$W->{"args_persistent"}})),
 391                                 %{$uri->query_form_hash()},
 392                                 });
 393                 }
 394         return $uri->abs(unparsed_uri()) if $W->{"args"}{"Wabs"} || $args{"abs"};
 395         return $uri->rel(unparsed_uri());
 396 }
 397
 398 sub path_abs_disk_register($)
 399 {
 400 my($path_abs_disk)=@_;
 401
 402         $W->{"path_abs_disk_register"}{$path_abs_disk}=1;
 403 }
 404
 405 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
 406 sub path_abs_disk($%)
 407 {
 408 my($in,%args)=@_;
 409
 410         cluck if !$args{"uri_as_in"} && ref $in;
 411         my $uri=in_to_uri_abs($in);
 412         cluck if !uri_is_local($uri);
 413         my $path=$uri->path();
 414         cluck "URI compatibility: ->path() not w/leading slash of URI \"$uri\"; path: $path" if $path!~m{^/};
 415         my $r=dir_top_abs_disk().$path;
 416         path_abs_disk_register $r if !defined $args{"register"} || $args{"register"};
 417         return $r;
 418 }
 419
 420 sub fatal (;$);
 421
 422 sub _args_check (%)
 423 {
 424 my(%tmpl)=@_;
 425
 426         while (my($name,$regex)=each(%tmpl)) {
 427                 my $name_html="Parameter <span class=\"quote\">".escapeHTML($name)."</span>";
 428                 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
 429                 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
 430                 fatal "$name_html passed as multivar although singlevar expected"
 431                                 if ref $W->{"args"}{$name} && !ref $regex;
 432                 $regex=$regex->[0] if ref $regex;
 433                 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
 434                         $val="" if !defined $val;
 435                         fatal "$name_html <span class=\"quote\">".escapeHTML($val)."</span>"
 436                                                         ." does not match the required regex <span class=\"quote\">".escapeHTML($regex)."</span> "
 437                                         if $regex ne "" && $val!~/$regex/;
 438                         }
 439                 }
 440 }
 441
 442 sub vskip (;$)
 443 {
 444 my($height)=@_;
 445
 446         return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'>&nbsp;</p>'."\n";
 447 }
 448
 449 sub fatal (;$)
 450 {
 451 my($msg)=@_;
 452
 453         $msg="UNKNOWN" if !$msg;
 454         cluck "FATAL: $msg";
 455
 456         # Do not send it unconditionally.
 457         # The intial duplicated '<?xml...' crashes Gecko parser.
 458         $W->{"heading_done"}=0 if $W->{"header_only"};
 459         # Do not send it unconditionally.
 460         # Prevents warn: Headers already sent
 461         if (!$W->{"heading_done"}) {
 462                 $W->{"indexme"}=0;      # For the case no heading was sent yet.
 463                 $W->{"header_only"}=0;  # assurance for &heading
 464                 My::Web->heading();
 465                 }
 466         Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
 467                         ."<p>You can report this problem's details to"
 468                         ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
 469         footer();
 470 }
 471
 472 sub footer (;$)
 473 {
 474         exit 1 if $W->{"footer_passed"}++;      # deadlock prevention:
 475
 476         Wprint vskip if $W->{"footer_delimit"};
 477
 478         do { Wprint $_ if $_; } for $W->{"footing_delimit"};
 479
 480         Wprint "<hr />\n" if $W->{"footer"};
 481
 482         my $packages_used=$packages_used_array{$W->{"__PACKAGE__"}};
 483
 484         if ($W->{"footer_ids"}) {
 485                 Wprint '<p class="cvs-id">';
 486                 Wprint join("<br />\n",map({ my $package=$_;
 487                         my $cvs_id=(eval('$'.$package."::CVS_ID")
 488 #                                       || $package     # debug
 489                                         );
 490                         if (!$cvs_id) {
 491                                 ();
 492                                 }
 493                         else {
 494                                 $cvs_id='$'.$cvs_id.'$';        # Eaten by 'q' operator.
 495                                 my @cvs_id_split=split / +/,$cvs_id;
 496                                 if (@cvs_id_split==8) {
 497                                         my $file=$package;
 498                                         $file=~s#::#/#g;
 499                                         my $ext;
 500                                         my @tried;
 501                                         for (qw(.pm)) {
 502                                                 $ext=$_;
 503                                                 my $path_abs_disk=path_abs_disk("/$file$ext");
 504                                                 push @tried,$path_abs_disk;
 505                                                 last if -r $path_abs_disk;
 506                                                 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
 507                                                 }
 508                                         $file.=$ext;
 509                                         $cvs_id_split[2]=""
 510                                                         .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
 511                                                                         $cvs_id_split[2]);
 512                                         $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
 513                                                         ($package!~/^Apache2::/ ? $package : $cvs_id_split[1]));
 514                                         $cvs_id_split[5]=&{$W->{"cvs_id_author_sub"}}($cvs_id_split[5]);
 515                                         }
 516                                 join " ",@cvs_id_split;
 517                                 }
 518                         } @$packages_used));
 519                 Wprint "</p>\n";
 520                 }
 521
 522         for my $package (@$packages_used) {
 523                 my $cvs_id=(eval('$'.$package."::CVS_ID")
 524 #                               || $package     # debug
 525                                 );
 526                 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
 527                 }
 528
 529         do { Wprint $_ if $_; } for $W->{"footing"};
 530
 531         Wprint "</body></html>\n";
 532         exit 0;
 533 }
 534
 535 # Existing entries are overwritten.
 536 sub header(%)
 537 {
 538 my(%pairs)=@_;
 539
 540         while (my($key,$val)=each(%pairs)) {
 541                 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
 542                 $W->{"r"}->headers_out()->set($key,$val);
 543                 }
 544 }
 545
 546 sub size_display ($)
 547 {
 548 my($size)=@_;
 549
 550            if ($size<4096)
 551                 {}
 552         elsif ($size<1024*1024)
 553                 { $size=sprintf "%.1fK",$size/1024; }
 554         else
 555                 { $size=sprintf "%.1fM",$size/1024/1024; }
 556         $size.="B";
 557         return $size;
 558 }
 559
 560 sub uri_is_local($)
 561 {
 562 my($in)=@_;
 563
 564         my $uri_rel=in_to_uri_abs($in)->rel(unparsed_uri());
 565         # Do not: defined $uri_rel->("userinfo"|"host"|"port")();
 566         # as they fail to be called for schemes not supporting them.
 567         return 0 if $uri_rel->scheme();
 568         return 0 if $uri_rel->authority();
 569         return 1;
 570 }
 571
 572 # &path_web still may be required for &uri_escaped !
 573 sub uri_escaped($)
 574 {
 575 my($uri)=@_;
 576
 577         cluck if !ref $uri;
 578         my $urient=escapeHTML($uri);
 579         return $uri    if $uri eq $urient;
 580         request_check();
 581         return $urient if uri_is_local $uri;
 582         return $uri    if defined $W->{"have_ent"} && !$W->{"have_ent"};        # non-ent client
 583         return $urient if $W->{"have_ent"};     # ent client
 584         # Unknown client, &escapeHTML should not be needed here:
 585         return escapeHTML(path_web('/My/Redirect.pm?location='.uri_escape($uri->abs(unparsed_uri()))));
 586 }
 587
 588 our $a_href_inhibited;
 589 sub a_href($;$%)
 590 {
 591 my($in,$contents,%args)=@_;
 592
 593         request_check();
 594         do { $$_=1 if !defined $$_; } for (\$args{"size"});
 595         if (!defined $contents) {
 596                 $contents=$in;
 597                 $contents=File::Basename::basename($contents) if $args{"basename"};
 598                 $contents=escapeHTML($contents);
 599                 }
 600         $contents=~s#<a\b[^>]*>##gi;
 601         $contents=~s#</a>##gi;
 602         return $contents if $a_href_inhibited;
 603
 604         my $path_web=path_web $in,%args;
 605         my $r="";
 606         $r.='<a href="';
 607         $r.=uri_escaped $path_web;
 608         $r.='"';
 609         do { $r.=" $_" if $_; } for ($args{"attr"});
 610         $r.='>'.$contents.'</a>';
 611         if ($args{"size"} && uri_is_local($in) && ($args{"size"}>=2 || $in=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) {   # Downloadable?
 612                 my $path_abs_disk=path_abs_disk $in,%args;
 613                 cluck "File not readable: $path_abs_disk" if !-r $path_abs_disk;
 614                 $r.='&nbsp;('.size_display((stat($path_abs_disk))[7]).')';
 615                 }
 616         return $r;
 617 }
 618
 619 sub a_href_inhibit($$;@)
 620 {
 621 my($self,$sub,@sub_args)=@_;
 622
 623         local $a_href_inhibited=1;
 624         return &{$sub}(@sub_args);
 625 }
 626
 627 sub input_hidden_persistents()
 628 {
 629         request_check();
 630         return join("",map({
 631                 my $key=$_;
 632                 my $val=$W->{"args"}{$key};
 633                 (!defined $val ? () : '<input type="hidden"'
 634                                 .' name="'.escapeHTML($key).'"'
 635                                 .' value="'.escapeHTML($val).'"'
 636                                 .' />'."\n");
 637                 } (keys(%{$W->{"args_persistent"}}))));
 638 }
 639
 640 sub http_moved($$;$)
 641 {
 642 my($self,$url,$status)=@_;
 643
 644         $url=path_web($url,"abs"=>1);
 645         $status||=HTTP_MOVED_TEMPORARILY;
 646         $W->{"r"}->status($status);
 647         $W->{"r"}->headers_out()->{"Location"}=$url;
 648         $W->{"header_only"}=1;
 649         My::Web->heading();
 650         exit;
 651         die "NOTREACHED";
 652 }
 653
 654 sub remote_ip ()
 655 {
 656         # Do not: PerlModule                 Apache2::ForwardedFor
 657         #         PerlPostReadRequestHandler Apache2::ForwardedFor
 658         # As 'Apache2::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
 659         # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
 660         # We must take the last item ourselves.
 661         # Be VERY sure you always retrieve all the headers unconditionally to hit: My::Hash::RecordKeys
 662         my $x_forwarded_for=$W->{"headers_in"}{"X-Forwarded-For"};
 663         $x_forwarded_for=~s/^.*,\s*// if $x_forwarded_for;
 664         my $remote_ip=$W->{"headers_in"}{"_remote_ip"};
 665         my $r;
 666         $r||=$x_forwarded_for;
 667         $r||=$remote_ip;
 668         return $r;
 669 }
 670
 671 # $url={"JP"=>"http://specific",...};
 672 # $url={""=>"http://default",...};
 673 sub a_href_cc($$;%)
 674 {
 675 my($url,$contents,%args)=@_;
 676
 677         # A bit ineffective but we must process all the possibilities to get stable 'headers_in' hits!
 678         my %map=map(($_=>a_href($url->{$_},$contents,%args)),keys(%$url));
 679         my $cc;
 680         $cc||=Geo::IP->new()->country_code_by_addr(remote_ip()) if $have_Geo_IP;
 681         $cc||="";
 682         my $r=$map{$cc};
 683         return $r if $r;
 684         return $contents;
 685 }
 686
 687 sub make ($)
 688 {
 689 my($cmd)=@_;
 690
 691         # FIXME: &alarm, --timeout is now infinite.
 692         # FIXME: Try to remove bash(1).
 693         # FIXME: Use: @PATH_FLOCK@
 694         my @argv=('flock',dir_top_abs_disk(),'bash','-c',$cmd.' >&2');
 695         print STDERR join(" ","SPAWN:",@argv)."\n";
 696         system @argv;
 697 }
 698
 699 sub make_file($$)
 700 {
 701 my($self,$file)=@_;
 702
 703         cluck "Pathname not absolute: $file" if $file!~m{^/};
 704         return if -f $file;
 705         # TODO: Somehow quickly check dependencies?
 706         return make('make -s --no-print-directory'
 707                                         .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'");
 708 }
 709
 710 sub img_size ($$)
 711 {
 712 my($width,$height)=@_;
 713
 714         cluck if !defined $width || !defined $height;
 715         return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
 716                         ." width=\"$width\" height=\"$height\"";
 717 }
 718
 719 sub negotiate_variant (%)
 720 {
 721 my(%args)=@_;
 722
 723         my @fields=("id","qs","content-type","encoding","charset","lang","size");
 724         return [ map(($args{$_}),@fields) ];
 725 }
 726
 727 # Input: $self is required!
 728 # Input: Put the fallback variant as the first one.
 729 # Returns: always only scalar!
 730 sub Negotiate_choose($$)
 731 {
 732 my($self,$variants)=@_;
 733
 734         # Limit these entries to generate proper 'Vary' header.
 735         my %hash=(map(($_=>$W->{"headers_in"}{$_}),qw(
 736                         Accept
 737                         Accept-Charset
 738                         Accept-Encoding
 739                         Accept-Language
 740                         )));
 741         my $best=HTTP::Negotiate::choose($variants,
 742                         # Do not: $W->{"r"}
 743                         # to prevent: Can't locate object method "scan" via package "Apache2::RequestRec" at HTTP/Negotiate.pm line 84.
 744                         # Do not: $W->{"r"}->headers_in()
 745                         # to prevent: Can't locate object method "scan" via package "APR::Table" at HTTP/Negotiate.pm line 84.
 746                         # Do not: HTTP::Headers->new($W->{"r"}->headers_in());
 747                         # to prevent empty result or even: Odd number of elements in anonymous hash
 748                         HTTP::Headers->new(%hash));
 749         $best||=$variants->[0][0];      # $variants->[0]{"id"}; &HTTP::Negotiate::choose failed?
 750         return $best;
 751 }
 752
 753 my @img_variants=(
 754                 { "id"=>"png","qs"=>0.9,"content-type"=>"image/png" },
 755                 { "id"=>"gif","qs"=>0.7,"content-type"=>"image/gif" },
 756                 );
 757 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 758
 759 # Returns: ($path_web,$path_abs_disk)
 760 # URI path segments support ignored here. Where it is used? (';' path segment options)
 761 sub _img_src($%)
 762 {
 763 my($in,%args)=@_;
 764
 765         cluck if !uri_is_local $in;
 766         my $uri=in_to_uri_abs $in;
 767         my $path_abs_disk=path_abs_disk $uri,%args,"uri_as_in"=>1,"register"=>0;
 768
 769         # Known image extension?
 770         return path_web($uri,%args,"uri_as_in"=>1),$path_abs_disk if $uri->path()=~m#$img_variants_re#o;
 771
 772         my @nego_variants;
 773         for my $var (@img_variants) {
 774                 my $path_abs_disk_variant=$path_abs_disk.".".$var->{"id"};
 775                 path_abs_disk_register($path_abs_disk_variant);
 776                 __PACKAGE__->make_file($path_abs_disk_variant);
 777                 push @nego_variants,negotiate_variant(
 778                                 %$var,
 779                                 "size"=>(stat $path_abs_disk_variant)[7],
 780                                 );
 781                 }
 782         my $ext=__PACKAGE__->Negotiate_choose(\@nego_variants);
 783
 784         $uri->path($uri->path().".$ext");
 785         return path_web($uri,%args,"uri_as_in"=>1),path_abs_disk($uri,%args,"uri_as_in"=>1);
 786 }
 787
 788 # $args{"attr"}
 789 sub img ($$%)
 790 {
 791 my($in,$alt,%args)=@_;
 792
 793         request_check();
 794         my($path_web,$path_abs_disk)=_img_src($in,%args);
 795         my($width,$height)=Image::Size::imgsize($path_abs_disk);
 796         $alt=~s/<[^>]*>//g;
 797         $alt=escapeHTML($alt);
 798         my $content="<img src=\"".uri_escaped($path_web)."\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
 799                         .(!$args{"attr"} ? "" : " ".$args{"attr"})." />";
 800         do { return a_href((_img_src($_))[0],$content,"uri_as_in"=>1) if $_; } for $args{"a_href_img"};
 801         do { return a_href $_,$content if $_; } for $args{"a_href"};
 802         return $content;
 803 }
 804
 805 sub centerimg
 806 {
 807         my $r="";
 808         $r.='<table border="0" width="100%"><tr>'."\n";
 809         @_=( [@_] ) if !ref $_[0];
 810         for (@_) {
 811                 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
 812                 }
 813         $r.='</tr></table>'."\n";
 814         return $r;
 815 }
 816
 817 sub rightimg
 818 {
 819 my($text,@args_img)=@_;
 820
 821         # FIXME: Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
 822         #        <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
 823         #        <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
 824         # causes whole invisible projects in: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050719 Galeon/1.3.21
 825         return <<"HERE";
 826 <table border="0" width="100%">
 827         <tr>
 828                 <td align="left">
 829                         @{[ $text ]}
 830                 </td>
 831                 <td align="right">
 832                         @{[ &{\&img}(@args_img) ]}
 833                 </td>
 834         </tr>
 835 </table>
 836 HERE
 837 }
 838
 839 sub readfile($$)
 840 {
 841 my($class,$filename)=@_;
 842
 843         local *F;
 844         open F,$filename or cluck "Cannot open \"$filename\": $!";
 845         my $F=do { local $/=undef(); <F>; };
 846         close F or cluck "Cannot close \"$filename\": $!";
 847         return $F;
 848 }
 849
 850 sub _no_cache($)
 851 {
 852 my($self)=@_;
 853
 854         header("Expires"=>HTTP::Date::time2str(1000000000));    # date in the past
 855         header("Last-Modified"=>HTTP::Date::time2str());        # always modified
 856         header("Cache-Control"=>join(", ",
 857                         "no-cache",
 858                         "no-store",
 859                         "must-revalidate",
 860                         "max-age=0",
 861                         "pre-check=0",  # MSIE
 862                         "post-check=0", # MSIE
 863                         ));     # HTTP/1.1
 864         header("Pragma"=>"no-cache");   # HTTP/1.0
 865         header("Vary"=>"*");    # content may ba based on unpredictable sources
 866 }
 867
 868 sub headers_in_filtered(@)
 869 {
 870 my(@keys)=@_;
 871
 872         return map(($_=>$W->{"headers_in"}{$_}),@keys);
 873 }
 874
 875 our %uri_args_frozen_to_headers_in_keys;
 876 our %uri_args_headers_in_frozen_to_headers_out;
 877
 878 sub uri_args_headers_in_frozen_get($)
 879 {
 880 my($headers_in_keys_arrayref)=@_;
 881
 882         my %uri_args_headers_in_hash=(
 883                 "uri_args_frozen"=>$W->{"uri_args_frozen"},
 884                 "headers_in"=>{ headers_in_filtered(@$headers_in_keys_arrayref) },
 885                 );
 886         return do { local $Storable::canonical=1; Storable::freeze(\%uri_args_headers_in_hash); };
 887 }
 888
 889 sub cache_output_filter($)
 890 {
 891 my($f)=@_;
 892
 893         while ($f->read(my $text,0x400)) {
 894                 cluck "utf-8 untested" if Encode::is_utf8($text);       # Possible here at all?
 895                 $f->print($text);
 896                 $W->{"digest-md5"}->add($text);
 897                 }
 898         return OK;
 899 }
 900
 901 sub cache_start()
 902 {
 903         if (!$W->{"http_safe"}) {
 904                 __PACKAGE__->_no_cache();
 905                 return;
 906                 }
 907
 908         {
 909                 # &Wrequire it here even if it will not be later used; to be stable!
 910                 Wrequire 'My::Hash::RestrictTo';
 911                 my %uri_args_hash=(
 912                         "uri"=>"http://".$W->{"web_hostname"}."/".$W->{"r"}->uri(),
 913                         "args"=>$W->{"args_orig_array"},
 914                         );
 915                 $W->{"uri_args_frozen"}=do { local $Storable::canonical=1; Storable::freeze(\%uri_args_hash); };
 916                 last if !(my $headers_in_keys_arrayref=$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}});
 917
 918                 # Protection to be sure we are stable:
 919                 $W->{"headers_in"}=My::Hash::RestrictTo->new($W->{"headers_in"},@$headers_in_keys_arrayref);
 920
 921                 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get($headers_in_keys_arrayref);
 922                 last if !(my $headers_out_hashref=$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}});
 923                 header(%$headers_out_hashref);
 924                 my $status;
 925                 {
 926                         # &meets_conditions will always deny the attempt if !2xx status().
 927                         # At least ap_read_request() sets: r->status=HTTP_REQUEST_TIME_OUT;     /* Until we get a request */
 928                         my $status_old=$W->{"r"}->status();
 929                         $W->{"r"}->status(HTTP_OK);
 930                         # Update httpd's 'r->mtime' as the header "Last-Modified" is just not enough for ap_meets_conditions():
 931                         # &update_mtime() argument is really in _secs_, not in _msecs_ as the docs claim.
 932                         # Be aware '*1000000' would overflow Perl integer anyway.
 933                         # &set_last_modified would also override the "Last-Modified" headers_out!
 934                         # &mtime may exist but somehow does not work.
 935                         $W->{"r"}->update_mtime(HTTP::Date::str2time($headers_out_hashref->{"Last-Modified"}));
 936                         $status=$W->{"r"}->meets_conditions();
 937                         $W->{"r"}->status($status_old);
 938                         }
 939                 last if OK==$status;
 940                 $W->{"r"}->status($status);
 941                 exit 0;
 942                 die "NOTREACHED";
 943                 }
 944
 945         $W->{"digest-md5"}=Digest::MD5->new();
 946         $W->{"cache_active"}=1;
 947         $W->{"r"}->add_output_filter(\&cache_output_filter);
 948 }
 949
 950 sub cache_finish_last_modified()
 951 {
 952         cluck "Not yet done now? W __PACKAGE__: ".$W->{"__PACKAGE__"}
 953                         if !$packages_used_hash{$W->{"__PACKAGE__"}}{"_done"};
 954         for my $package_orig (@{$packages_used_array{$W->{"__PACKAGE__"}}}) {
 955                 local $_=$package_orig.".pm";
 956                 s{::}{/}g;
 957                 path_abs_disk "/$_","register"=>1;
 958                 }
 959         my $mtime_newest;
 960         for my $path_abs_disk (keys(%{$W->{"path_abs_disk_register"}})) {
 961                 my $mtime=(stat $path_abs_disk)[9];
 962                 do { cluck "No mtime for: $path_abs_disk"; next; } if !$mtime;
 963                 $mtime_newest=$mtime if !$mtime_newest || $mtime_newest<$mtime;
 964                 }
 965         cluck "No mtime_newest found for the current W __PACKAGE__: ".$W->{"__PACKAGE__"}
 966                         if !$mtime_newest;
 967         return HTTP::Date::time2str($mtime_newest);
 968 }
 969
 970
 971 sub cache_finish()
 972 {
 973         # Do not: return if !$W->{"uri_args_frozen"};
 974         # as we may have just gave 304 and 'exit 0;' without starting the caching.
 975         return if !$W->{"cache_active"};
 976
 977         # Fill-in/check: %uri_args_frozen_to_headers_in_keys
 978         my $headers_in_keys_stored_arrayref_ref=\$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}};
 979         my @headers_in_keys=tied(%{$W->{"headers_in_RecordKeys"}})->accessed();
 980         if (!$$headers_in_keys_stored_arrayref_ref
 981                         || !Data::Compare::Compare(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)) {
 982                 cluck "Non-matching generated 'headers_in_keys' per 'uri_args_frozen' key:\n"
 983                                                 .Dumper(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)
 984                                 if $$headers_in_keys_stored_arrayref_ref;
 985                 # Build or possibly prevent such further warn dupes:
 986                 $$headers_in_keys_stored_arrayref_ref=\@headers_in_keys;
 987                 # Build or regenerate as obsoleted now:
 988                 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get(\@headers_in_keys);
 989                 }
 990
 991         # Prepare 'headers_out' for the future reusal:
 992         my %headers_out;
 993         # Do not: $W->{"digest-md5"}->b64digest();
 994         # as it will not provide the trailing filling '='s.
 995         # RFC 1864 is not clear but the same provides them.
 996         # FIXME: Should we somehow provide "\r\n" newlines for the text data? Which content is "text"?
 997         # ',""' to avoid breaking the headers by its default "\n".
 998         $headers_out{"Content-MD5"}=MIME::Base64::encode_base64($W->{"digest-md5"}->digest(),"");
 999         # In fact we could also use MD5 for ETag as if we know ETag we also know MD5.
1000         # But this way we do not need to calculate MD5 and we still can provide such ETag. So.
1001         # $W->{"r"}->set_etag() ?
1002         $headers_out{"ETag"}='"'.Digest::MD5::md5_base64($W->{"uri_args_headers_in_frozen"}).'"';
1003         # $W->{"r"}->set_content_length() ?
1004         $headers_out{"Content-Length"}=$W->{"r"}->bytes_sent();
1005         my %Vary=map(($_=>1),(@headers_in_keys));
1006         for (keys(%Vary)) {
1007                 next if !/^_/;
1008                 $Vary{"*"}=1;
1009                 delete $Vary{$_};
1010                 }
1011         %Vary=("*"=>1) if $Vary{"*"};
1012         $headers_out{"Vary"}=join(", ",sort keys(%Vary));
1013         # $W->{"r"}->set_last_modified() ?
1014         $headers_out{"Last-Modified"}=cache_finish_last_modified();
1015
1016         # Fill-in/check: %uri_args_headers_in_frozen_to_headers_out
1017         my $headers_out_stored_hashref_ref=\$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}};
1018         if (!$$headers_out_stored_hashref_ref
1019                         || !Data::Compare::Compare(\%headers_out,$$headers_out_stored_hashref_ref)) {
1020                 cluck "Non-matching generated 'headers_out' per 'uri_args_headers_in_frozen' key:\n"
1021                                                 .Dumper(\%headers_out,$$headers_out_stored_hashref_ref)
1022                                 if $$headers_out_stored_hashref_ref;
1023                 # Build or possibly prevent such further warn dupes:
1024                 $$headers_out_stored_hashref_ref=\%headers_out;
1025                 }
1026
1027 ###print STDERR Dumper(\%uri_args_frozen_to_headers_in_keys,\%uri_args_headers_in_frozen_to_headers_out);
1028 }
1029
1030 sub heading()
1031 {
1032 my($class)=@_;
1033
1034         if (!$W->{"header_only"}) {
1035                 header("Content-Style-Type"=>"text/css");
1036                 header("Content-Script-Type"=>"text/javascript");
1037                 # $W->{"r"}->content_languages() ?
1038                 do { header("Content-Language"=>$_) if $_; } for $W->{"language"};
1039                 }
1040         # TODO: Support also: private
1041         header("Cache-Control"=>"public");      # HTTP/1.1
1042
1043         # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
1044         my $client_charset=$W->{"force_charset"} || "us-ascii";
1045
1046         # Workaround bug
1047         #   https://bugzilla.mozilla.org/show_bug.cgi?id=120556
1048         # of at least
1049         #   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1050         my $mime;
1051         # http://validator.w3.org/ does not send ANY "Accept" headers!
1052         $mime||="application/xhtml+xml" if 1
1053                         && !$W->{"headers_in"}{"Accept"}
1054                         && ($W->{"headers_in"}{"User-Agent"}||"")=~m{^W3C_Validator/}i;
1055         $mime||=$class->Negotiate_choose([
1056                         # Put the fallback variant as the first one.
1057                         # Rate both variants the same to prefer "text/html" for undecided clients.
1058                         # At least
1059                         #   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1060                         # prefers "application/xhtml+xml" over "text/html" itself:
1061                         #   text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
1062                         negotiate_variant(
1063                                         "id"=>"text/html",
1064                                         "content-type"=>"text/html",
1065                                         "qs"=>0.6,
1066                                         "charset"=>$client_charset,
1067                                         "lang"=>$W->{"language"},
1068                                         ),
1069                         negotiate_variant(
1070                                         "id"=>"application/xhtml+xml",
1071                                         "content-type"=>"application/xhtml+xml",
1072                                         "qs"=>0.6,
1073                                         "charset"=>$client_charset,
1074                                         "lang"=>$W->{"language"},
1075                                         ),
1076                         # application/xml ?
1077                         # text/xml ?
1078                         ]);
1079         # mod_perl doc: If you set this header via the headers_out table directly, it
1080         #               will be ignored by Apache. So do not do that.
1081         $W->{"r"}->content_type("$mime; charset=$client_charset");
1082
1083         cache_start();
1084         return if $W->{"header_only"};
1085         # We still can append headers before we put out some text.
1086         # FIXME: It is not clean to still append them without overwriting.
1087         return if $W->{"heading_done"}++;
1088
1089         Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n" if $mime=~m{^application/\w+[+]xml$};
1090         return if $W->{"xml_header_only"};
1091         Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
1092         Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$W->{"language"}.'">'."\n";
1093         my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
1094         # Do not: cluck if $title=~/[<>]/;
1095         # as it is not solved just by: &a_href_inhibit
1096         # as sometimes titles use also: <i>...</i>
1097         $title=~s#<[^>]*>##g;
1098         Wprint "<head>";
1099         Wprint "<title>$title</title>\n";
1100         if ($W->{"have_css"}) {
1101                 # Everything can get overriden later.
1102                 for my $css ("/My/Web.css",map((!$_ ? () : ("ARRAY" ne ref($_) ? $_ : @$_)),$W->{"css_push"})) {
1103                         Wprint <<"HERE";
1104 <link rel="stylesheet" type="text/css" href="@{[ uri_escaped(path_web $css) ]}" />
1105 HERE
1106                         }
1107                 if ($W->{"css_inherit"}) {
1108                         Wprint <<"HERE";
1109 <script type="text/javascript" src="@{[ uri_escaped(path_web('/My/css_inherit.js')) ]}" />
1110 HERE
1111                         }
1112                 }
1113         Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
1114         Wprint $W->{"head"};
1115         for my $type (qw(prev next index contents start up)) {
1116                 do { Wprint '<link rel="'.$type.'" href="'.uri_escaped(path_web $_).'" />'."\n" if $_; }
1117                                 for ($W->{"rel_$type"});
1118                 }
1119         Wprint "</head><body";
1120 #       Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
1121 #                       if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
1122         Wprint $W->{"body_attr"};
1123         Wprint ">\n";
1124
1125         do { Wprint $_ if $_; } for $W->{"heading"};
1126 }
1127
1128 BEGIN {
1129         delete $W->{"__My::Web_init"};
1130         }
1131
1132 1;